Jose C. Troncoso, MD
Rheumatology Physician · Oakland, CA
Jose C. Troncoso, MD is a rheumatology physician with a practice address in Oakland, California, and NPI 1457439234, issued on Nov 1, 2006. Check the license (California A50997, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jose C. Troncoso
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A50997 CA
Self-reported in NPPES; status is on the state search - Practice location
- 275 W Macarthur Blvd, Oakland, CA 94611
- Phone
- (510) 752-1000
- Enumerated
- Nov 1, 2006
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A509970 CA
- Medicare enrollment
- Enrolled (PECOS I20110502000537); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 275 W Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jose C. Troncoso in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A50997Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,932 Medicare Part D claims for 943 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Methotrexate153 claims
- Hydroxychloroquine Sulfate134 claims
- Prednisone119 claims
- Atorvastatin Calcium105 claims
- Losartan Potassium51 claims
- Amlodipine Besylate50 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jose C. Troncoso among 926 rheumatology physician records in California
Jose C. Troncoso, MD is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1986 · median 2003 among the 641 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Oakland → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Chee Chow, MDOakland, CA 946111003994872
- Arezoo Haghshenas, M.D.Oakland, CA 946111881011856
- Lucy LiuOakland, CA 946111346510575
- Kate Scannell, MDOakland, CA 946111508902107
- Paul Feigenbaum, MDOakland, CA 946121710063243
- Yi Yi Gu, M.D.Oakland, CA 946091932183472
- Shweta Kishore, MDOakland, CA 946021912242462
- Ernest Maningding, MD, MPHOakland, CA 946021831551274
Common questions
What is Jose C. Troncoso, MD's NPI number?
Jose C. Troncoso, MD's National Provider Identifier (NPI) is 1457439234, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jose C. Troncoso, MD located?
The NPPES record lists a practice address at 275 W Macarthur Blvd, Oakland, CA, 94611. Phone: (510) 752-1000. Providers update this record themselves, so call before visiting.
How can I verify Jose C. Troncoso, MD's license?
NPPES lists California license number A50997, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jose C. Troncoso, MD prescribe under Medicare Part D?
In 2024, Jose C. Troncoso, MD had 1,932 Medicare Part D claims for 943 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.